Evaluation of Gesture Control with Mid-air Haptics in a Static Driving Simulator
摘要
Touchscreen are now the most widely used human machine interface (HMI) in cars, they are both intuitive and distracting, which leads to a high number of off-road glances. A promising alternative HMI technology is mid-air haptic feedback for gesture control. In order to be perceived by the skin ultrasonic waves of mid-air haptics with modulation frequencies below 300 Hz are used. This study evaluates study parameters tested in two previous studies and their combinations in a more advanced static driving simulator. The participants moved a virtual slider with gestures to a target snap point while driving in a simulator. During the study objective parameters were recorded and after each test-run subjective parameters were recorded. Eight study parameter combinations (SP) with different combinations of modulation frequency (50, 80, 128 and 200 Hz), feedback location (palm, middle finger), three different slider modes (symmetric, asymmetric and continuous) and one solely visual SP are investigated. Participants palm surface area (PSA) was estimated based on pictures. Two older participants were excluded due to not recognizing the mid-air haptics and one due to motion sickness. Remaining participants: 27 older participants with average age of 63.0 years old, 30 younger participants with average age of 28.1 years old. Significant differences between the two age groups were found for setting time, precision, learnability and mental demand rating. Significant correlations to PSA were found for setting time and Lane Change Test mean speed. The solely visual feedback led to highest task fulfilment and the highest number off-road glances.